How to convert php unicode into Chinese characters

In Web development, the conversion between Unicode and Chinese characters is a very common requirement. Especially in Chinese websites or applications, it is very important to convert the Unicode input by the user into Chinese characters. This article will introduce how to use PHP to convert Unicode encoding to Chinese characters.

1. Unicode encoding

Unicode encoding is a standard encoding method used to represent various characters, and can represent almost all characters in the world. Unicode encoding is developed by the international organization Unicode Consortium, which assigns a unique encoding value to each character.

In Unicode encoding, each character has a unique encoding point, represented by "U" plus the hexadecimal value of the character. For example, the code point of the English letter A is "U 0041", and the code point of the Chinese character "you" is "U 4F60".

2. Convert Unicode encoding into Chinese characters

In PHP, you can use the mb_convert_encoding() function to convert Unicode encoding into Chinese characters. The syntax of this function is as follows:

string mb_convert_encoding ( string $str , string $to_encoding [, mixed $from_encoding = mb_internal_encoding() ] )

where $str is the Unicode encoding character to be converted String, $to_encoding is the target encoding method, here it is "UTF-8"; $from_encoding is the source encoding method, if not set, it defaults to the internal encoding of the current system.

For example, if you want to convert "U 4F60" to "you", you can use the following code:

$unicode = '\u4f60';
$decode = json_decode('"' . $unicode . '"');
echo mb_convert_encoding($decode, 'UTF-8', 'Unicode');

Note: When transmitting JSON data, Chinese strings (including Unicode encoding) must Add double quotes.

3. Convert Chinese characters to Unicode encoding

If you want to convert Chinese characters to Unicode encoding, you can use PHP's built-in functions ord() and dechex(). The ord() function returns the ASCII code value of the first character of the string, and the dechex() function converts a decimal number to a hexadecimal number.

The following is a code example to convert the Chinese character "you" to Unicode encoding:

$str = '你';
echo '\u' . dechex(ord(substr($str,0,1))) . '\u' . dechex(ord(substr($str,1,1)));

The above code will return "\u4f60".

4. Summary

This article introduces how to convert Unicode encoding into Chinese characters and convert Chinese characters into Unicode encoding in PHP. In actual development, it is very important to be able to skillfully handle the conversion of Unicode encoding and Chinese characters.

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